Lifecycle Profiles

This guide explains the use of Lifecycle Profiles within the LEAP software to describe technological behavior and age distributions for device stocks across different yearly vintages.

• Lifecycle Profiles serve as a centralized method for describing the age distributions of device stocks and their technological behavior profiles across various yearly vintages, such as how vehicle fuel economy or pollutant emissions change as a vehicle ages.
• There are two types of lifecycle profiles: Aging Profiles, which track how a variable changes as devices age (expressed as a percentage relative to a new device, starting at 100%), and Distribution Profiles, which are used specifically for specifying device stocks in Current Accounts to show the distribution of vintages.
• Users can manage profiles through the General: Lifecycle Profiles menu, which allows for the creation, renaming, and deletion of profiles, as well as importing and exporting data via Excel spreadsheets.
• Profile values can be entered manually as Data Points or defined using an Exponential curve based on the formula V[t] = V[t-1] x Exp(t * Constant).

APA

Stockholm Environment Institute (n.d.). Lifecycle Profiles. https://cdn.leap.sei.org/Help24/Supporting_Screens/LifeCycle_Profiles.htm

Chicago

Stockholm Environment Institute. Lifecycle Profiles. n.d. https://cdn.leap.sei.org/Help24/Supporting_Screens/LifeCycle_Profiles.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Lifecycle Profiles |url=https://cdn.leap.sei.org/Help24/Supporting_Screens/LifeCycle_Profiles.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendlifecycle, author = {{Stockholm Environment Institute}}, title = {{Lifecycle Profiles}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/Help24/Supporting_Screens/LifeCycle_Profiles.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }